Hey guys My teacher give me a topic to design a tube power supply and write a paper about it for my project.

I have read several reviews of tube amplifier here and few of them still use tube rectifier in power supply design.

Any idea what (technically) reasons they keep use tube rectifier, considering disadvantage of high internal resistance and drop voltage?

Also if there any articles about comparison of tube rectifier and solid state diode, it would be really helpful.